A heat-shrinking device for LED light string processing and a control method thereof

Abstract

The application discloses a heat shrinking device for LED lamp string processing and a control method thereof, and relates to the technical field of lamp string heat shrinking, which comprises a clamping disc, one side of the clamping disc is provided with a sleeve module, the sleeve module is used for sleeving a heat shrink tube on the surface of the lamp string, and further comprises a heat shrinking module which is arranged on one side of the clamping disc and comprises a preheating cavity, a heating cavity and a forming cavity, low-heat rings and high-heat rings located at the center positions of the low-heat rings are arranged in the preheating cavity and the heating cavity, the axial direction of the lamp string is sequentially divided into an edge side area, a center area and an edge side area, and the temperature value of the high-heat ring is higher than that of the low-heat ring; a temperature detection module is arranged outside the preheating cavity and is used for detecting the temperature values of the center area and the edge side area of the heat shrink tube; and a distance detection module is arranged outside the preheating cavity; the lamp string is gradiently heated through the preheating cavity and the heating cavity in cooperation with the high-heat rings and the low-heat rings, the gas in the center area is discharged, and the problem type is analyzed.

Description

Technical Field

[0001] This invention relates to the field of heat shrink technology for LED light strings, and in particular to a heat shrink device and its control method for LED light string processing. Background Technology

[0002] In the production of LED light strings, heat shrink tubing is a core process to ensure the insulation and sealing of welded joints and improve structural reliability. The heat shrinking device, as the core processing equipment in this process, shrinks and shapes the heat shrink tubing through controlled heating. It is widely used in the mass production of various light strings and is of great significance for improving the electrical safety performance of products and ensuring production efficiency.

[0003] Chinese patent CN109732898B discloses an automatic heat shrink sleeve device for LED-T8 lamp tubes, including a frame, a main motor fixedly installed at the bottom of the frame, and the rotating shaft of the main motor being rotatably connected to the input shaft of the drive tooling divider through a first transmission chain.

[0004] Chinese Patent No. CN111745949B discloses an automatic assembly machine for heat shrink tubing film of LED lamp springs, including a frame, a vibration combing mechanism, a feeding mechanism and a film sleeve mechanism; the vibration combing mechanism includes a cylinder mounted on the frame, and a vibrator is provided on the cylinder.

[0005] The above-mentioned technical solutions all have some problems in use: for example, the existing heat shrinking device uses a heating chamber to heat shrink the heat shrink tube, and it cannot heat the light string in axial sections. During the heat shrinking process, because the diameter of the middle area of ​​the light string is small and the diameter of the two side areas is large, the heat shrink tube shrinks synchronously in all parts, which makes it impossible for the gas in the central area to be discharged, and it cannot guarantee the overall forming quality of the heat shrink tube and the consistency of the product.

[0006] Furthermore, existing heat shrinking devices cannot perform real-time detection and feedback adjustment. When the heat shrinking amount of the heat shrink tubing deviates, it cannot distinguish the fault type, such as incomplete venting in the central area of ​​the heat shrink tubing causing bulges, mismatch in the shrinking amount and speed between the central area and the side areas, or excessively thick or thin wall thickness of the heat shrink tubing itself. In addition, due to the inability to accurately locate the cause of the abnormality, it is not possible to adaptively adjust the heating temperature of the high-heat ring and low-heat ring in the heating chamber, and it is impossible to intervene and correct the heat shrinking parameters in advance. This makes it very easy to continuously produce defective parts and cause batches of defective products.

[0007] Therefore, it is necessary to solve the above problems by inventing a heat shrinking device and its control method for LED string processing. Summary of the Invention

[0008] The purpose of this invention is to provide a heat shrinking device and its control method for LED string processing, so as to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a heat shrinking device for processing LED light strings, comprising a clamping tray, a sleeve module disposed on one side of the clamping tray, the sleeve module being used to sleeve heat shrink tubing onto the surface of the light string, and further comprising: The heat shrink module is located on one side of the clamping tray and includes a preheating cavity, a heating cavity and a forming cavity. The preheating cavity and the heating cavity are both equipped with a low-heating ring and a high-heating ring located at the center of the low-heating ring. The axial direction of the light string is divided into side area - center area - side area, and the temperature value of the high-heating ring is higher than the temperature value of the low-heating ring. The temperature detection module is located outside the preheating cavity and is used to detect the temperature values ​​of the central and side areas of the heat shrink tubing. The distance detection module is located outside the preheating cavity and is used to detect the distance between its output end and the center and side areas of the heat shrink tubing.

[0010] A control method for a heat-shrinking device used in LED string processing, the control method utilizing the heat-shrinking device to heat-shrink LED strings, comprising the following steps: S1. Welding and assembly: Each execution unit performs welding and assembly of the light string on the intermittently rotating clamping plate. The heating temperatures of the low-heat ring and high-heat ring inside the preheating chamber, heating chamber, and forming chamber are all the initial temperature values. S2. Fit the heat shrink tubing. The clamping tray drives the light string to rotate to the tubing module. The tubing module fits the heat shrink tubing onto the outside of the assembled light string. S3. Heat shrink tubing preheating and venting: The clamping tray drives the light string to rotate into the preheating chamber. The low-heating ring inside the preheating chamber preheats and vents the entire heat shrink tubing, while the high-heating ring compensates for the heat in the central area of ​​the heat shrink tubing. S4. Data detection: After the preheating chamber has finished preheating and venting, the heat shrinking module moves away from the clamping plate. The distance detection module detects the distance between its output end and the center and side areas of the heat shrink tubing. The temperature detection module detects the temperature values ​​of the center and side areas of the heat shrink tubing and executes the judgment strategy. S5. Heat shrink forming: The clamping tray drives the light string to rotate into the heating chamber. The low-heat ring inside the heating chamber heat shrinks the entire heat shrink tube, while the high-heat ring compensates for the heat in the central area of ​​the heat shrink tube. S6. Cooling and shaping: The clamping tray drives the light string to rotate into the forming cavity for cooling and shaping. S7. Recycling: The clamping disc pulls the light string out of the forming cavity and recycles the light string in sections.

[0011] Preferably, the judgment strategy includes: When the distance detection module detects that the distance value of the center area is less than the set minimum distance value of the center area, and the distance value of the side area is less than the set minimum distance value of the side area, the first strategy is executed; When the distance detection module detects that the distance value of the center area is greater than the set minimum distance value of the center area and less than the set maximum distance value of the center area, and the distance value of the side area is greater than the set minimum distance value of the side area and less than the set maximum distance value of the side area, it indicates that the heat shrink tubing is preheating and venting normally in the preheating chamber, and S5 is executed. When the distance detection module detects that the distance value of the center area is less than the set minimum distance value of the center area or greater than the set maximum distance value of the center area, and the distance value of the side area is less than the set maximum distance value of the side area and greater than the set minimum distance value of the side area, the second strategy is executed. When the distance detection module detects that the distance value of the center area is greater than the set minimum distance value of the center area and less than the set maximum distance value of the center area, and the distance value of the side area is greater than the set maximum distance value of the side area or less than the set minimum distance value of the side area, the third strategy is executed. When the distance detection module detects that the distance value of the center area is greater than the set maximum distance value of the center area, and the distance value of the side area is greater than the set maximum distance value of the side area, the fourth strategy is executed.

[0012] Preferably, the first strategy includes: When the distance detection module detects that the distance difference between the center area and the side area is greater than the set minimum distance difference and less than the set maximum distance difference, and the temperature detection module detects that the temperature values ​​of both the side area and the center area of ​​the heat shrink tubing are greater than the set minimum temperature value and less than the set maximum temperature value, it indicates that the overall diameter of the heat shrink tubing has increased, raising the temperature values ​​of the low-heat ring and high-heat ring in the heating cavity, and S5 is executed. When the distance detection module detects that the distance difference between the center area and the side area is greater than the set minimum distance difference but less than the set maximum distance difference, and the temperature detection module detects that the temperature values ​​of both the side area and the center area of ​​the heat shrink tubing are less than the set minimum temperature value, it indicates that the heating temperature of the heat shrink tubing by the low-heating ring and the high-heating ring in the preheating cavity is too low. The temperature values ​​of the low-heating ring and the high-heating ring in the preheating cavity and the heating cavity are increased, and S5 is executed.

[0013] Preferably, the first strategy further includes: When the distance detection module detects that the distance difference between the center area and the side area is less than the set minimum distance difference, and the temperature detection module detects that the temperature difference between the center area and the side area of ​​the heat shrink tubing is less than the set minimum temperature difference, it indicates that the temperature difference between the low-heat ring and the high-heat ring in the preheating chamber is too small and the heating temperature of the high-heat ring is too low, resulting in the gas not being discharged from the center of the heat shrink tubing. Mark this light string as a defective product, increase the temperature values ​​of the low-heat ring and the high-heat ring in the preheating chamber, and execute S5. When the distance detection module detects that the distance difference between the center area and the side area is less than the set minimum distance difference, and the temperature detection module detects that the temperature difference between the center area and the side area of ​​the heat shrink tubing is greater than the set minimum temperature difference but less than the set maximum temperature difference, it indicates that the overall diameter of the heat shrink tubing has increased and the increase in the diameter of the center area is greater than that of the side area. This light string is marked as a defective product, and S5 is executed. When the distance detection module detects that the distance difference between the center area and the side area is greater than the set maximum distance difference, and the temperature detection module detects that the temperature difference between the center area and the side area of ​​the heat shrink tubing is greater than the maximum temperature difference, it indicates that the temperature difference between the low-heat ring and the high-heat ring in the preheating cavity is too large and the heating temperature of the low-heat ring is too low, resulting in the heat shrink tubing not shrinking to the appropriate size. Increase the temperature value of the low-heat ring in the preheating cavity and the heating cavity, and execute S5. When the distance detection module detects that the distance difference between the center area and the side area is greater than the set maximum distance difference, and the temperature detection module detects that the temperature difference between the center area and the side area of ​​the heat shrink tubing is greater than the set minimum temperature difference but less than the set maximum temperature difference, it indicates that the overall diameter of the heat shrink tubing has increased and the increase in the diameter of the center area is less than that of the side area. This light string is marked as a defective product, and S5 is executed.

[0014] Preferably, the second strategy includes: When the temperature detection module detects that the temperature value of the center area of ​​the heat shrink tubing is less than the set minimum temperature value, it indicates that the temperature of the high-temperature ring in the preheating cavity is too low. The temperature value of the high-temperature ring in the preheating cavity is increased, the light string is marked as a defective product, and S5 is executed. When the temperature detection module detects that the temperature value of the center area of ​​the heat shrink tubing is greater than the set minimum value but less than the set maximum temperature value, it indicates that the diameter of the heat shrink tubing in the middle position has changed, the light string is marked as a defective product, and S5 is executed. When the temperature detection module detects that the temperature value of the center area of ​​the heat shrink tubing is greater than the set maximum temperature value, it indicates that the temperature of the high-temperature ring in the preheating cavity is too high. The module then lowers the temperature value of the high-temperature ring in the preheating cavity and the temperature value of the high-temperature ring in the heating cavity to compensate for the overheating. Finally, S5 is executed.

[0015] Preferably, the third strategy includes: When the temperature detection module detects that the temperature value of the side area of ​​the heat shrink tubing is less than the set minimum temperature value, it indicates that the temperature of the low-temperature ring in the preheating cavity is too low. The temperature values ​​of the low-temperature ring in the preheating cavity and heating cavity are increased, and S5 is executed. When the temperature detection module detects that the temperature value of the side area of ​​the heat shrink tubing is greater than the set minimum value but less than the set maximum temperature value, it indicates that the diameter of the side area of ​​the heat shrink tubing has changed, the light string is marked as a defective product, and S5 is executed. When the temperature detection module detects that the temperature value of the side area of ​​the heat shrink tubing is greater than the set maximum temperature value, it indicates that the temperature of the low-temperature ring in the preheating cavity is too high. The temperature value of the low-temperature ring in the preheating cavity is reduced, the light string is marked as a defective product, and S5 is executed.

[0016] Preferably, the fourth strategy includes: When the distance detection module detects that the distance difference between the center area and the side area is greater than the set minimum distance difference and less than the set maximum distance difference, and the temperature detection module detects that the temperature values ​​of the side area and the center area of ​​the heat shrink tubing are both greater than the set minimum temperature value and less than the set maximum temperature value, it indicates that the overall diameter of the heat shrink tubing has decreased, reducing the temperature values ​​of the low-heat ring and high-heat ring in the heating cavity, and S5 is executed. When the distance detection module detects that the distance difference between the center area and the side area is greater than the set minimum distance difference but less than the set maximum distance difference, and the temperature detection module detects that the temperature values ​​of both the side area and the center area of ​​the heat shrink tubing are greater than the set maximum temperature value, it indicates that the heating temperature of the heat shrink tubing by the low-heating ring and the high-heating ring in the preheating cavity has increased. The temperature values ​​of the low-heating ring and the high-heating ring in the preheating cavity and the heating cavity are reduced, and S5 is executed.

[0017] Preferably, the fourth strategy further includes: When the distance detection module detects that the distance difference between the center area and the side area is greater than the set maximum distance difference, and the temperature detection module detects that the temperature difference between the center area and the side area of ​​the heat shrink tubing is greater than the set maximum temperature difference, it indicates that the temperature difference of the high-heat ring in the preheating cavity is too large, causing the heat shrink tubing to shrink too much at the center. Reduce the temperature of the high-heat ring in the preheating cavity and the heating cavity, and execute S5. When the distance detection module detects that the distance difference between the center area and the side area is greater than the set maximum distance difference, and the temperature detection module detects that the temperature difference between the center area and the side area of ​​the heat shrink tubing is greater than the set minimum temperature difference but less than the set maximum temperature difference, it indicates that the overall diameter of the heat shrink tubing has decreased and the decrease in the diameter of the center area is greater than that of the side area. This light string is marked as a defective product, and S5 is executed. When the distance detection module detects that the distance difference between the center area and the side area is less than the set minimum distance difference, and the temperature detection module detects that the temperature difference between the center area and the side area of ​​the heat shrink tubing is less than the minimum temperature difference, it indicates that the temperature of the low-temperature ring in the preheating cavity is too high, causing the overall shrinkage size of the heat shrink tubing to be too large. Reduce the temperature values ​​of the low-temperature ring in the preheating cavity and the heating cavity, mark this light string as a defective product, and execute S5. When the distance detection module detects that the distance difference between the center area and the side area is less than the set minimum distance difference, and the temperature detection module detects that the temperature difference between the center area and the side area of ​​the heat shrink tubing is greater than the set minimum temperature difference but less than the set maximum temperature difference, it indicates that the overall diameter of the light string has decreased and the decrease in the diameter of the center area is less than that of the side area. This light string is marked as a defective product, and S5 is executed.

[0018] The technical effects and advantages of this invention are as follows: 1. This invention uses a multi-stage chamber segmentation process with a preheating chamber, a heating chamber, and a cooling chamber, and combines high-heat rings and low-heat rings for sectional gradient heating along the axial direction of the light string. This adapts to the size characteristics of the light string, which is thick at the edges and thin in the middle. First, it preheats at a low temperature to remove the gas trapped in the central area of ​​the heat shrink tubing, and then it is shaped in sections at a high temperature. This eliminates heat shrink bulging defects, stabilizes the forming quality of the heat shrink tubing, and improves the consistency of the quality of the entire batch of light string products.

[0019] 2. This invention collects data in real time through the linkage of distance detection module and temperature detection module, and determines the root causes of various faults such as abnormal heat shrink tube wall thickness, cavity temperature drift, and LED string assembly defects in a layered manner. Based on the preset multi-level strategy, it adaptively adjusts the heating temperature of the high-heat ring and low-heat ring in the heating cavity, corrects the heat shrink process parameters in advance, avoids the continuous production of defective parts from the source, and eliminates the batch generation of defective products. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial structural diagram of the clamping disc of the present invention; Figure 3 This is a partial structural diagram of the heat-shrinkable module of the present invention; Figure 4 This is a schematic diagram of the internal structure of the preheating cavity of the present invention; Figure 5 This is a schematic diagram of the exploded structure of the light string and heat shrink tubing of the present invention; Figure 6 This is a schematic diagram of the overall process of the present invention.

[0021] In the diagram: 1. Clamping tray; 2. Heat shrinking module; 3. Temperature detection module; 4. Preheating chamber; 5. Heating chamber; 6. Forming chamber; 7. High-temperature heating ring; 8. Low-temperature heating ring; 9. Distance detection module; 10. Heat shrink tubing; 11. Sleeve module. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example 1 Existing traditional LED light string heat shrink processing equipment only has a single heating chamber 5, which cannot perform zoned and differentiated heating along the axial direction of the light string; because the structure of the light string is thin in the middle and thick on both sides, when the heat shrink tube 10 is heated and shrunk as a whole, the gas wrapped in the central area cannot be discharged smoothly, which easily leads to defects such as bulging and loose adhesion, making it difficult to unify the heat shrink molding quality and resulting in poor product processing quality consistency.

[0024] like Figures 1 to 5 As shown, the present invention provides a heat shrinking device for LED string processing, including a clamping tray 1, a sleeve module 11 disposed on one side of the clamping tray 1, the sleeve module 11 being used to sleeve heat shrink tubing 10 on the surface of the LED string, and further including: The heat shrink module 2, located on one side of the clamping tray 1, includes a preheating cavity 4, a heating cavity 5, and a forming cavity 6. Both the preheating cavity 4 and the heating cavity 5 are equipped with a low-heating ring 8 and a high-heating ring 7 located at the center of the low-heating ring 8, which are used to perform heat shrinking treatment on the heat shrink tube 10 on the surface of the light string. A telescopic unit is provided on one side of the heat shrink module 2 to drive the heat shrink module 2 to move, thereby driving the preheating cavity 4, the heating cavity 5, and the forming cavity 6 to move synchronously and adjust the distance between them and the clamping tray 1. At the same time, in conjunction with the intermittent rotation of the clamping tray 1, the light string enters the preheating cavity 4, the heating cavity 5, and the forming cavity 6 in sequence for the heat shrinking process.

[0025] The preheating chamber 4 and the heating chamber 5 are divided into side zone-center zone-side zone along the axial direction of the light string. The low-heating ring 8 heats the entire heat shrink tube 10, and the high-heating ring 7 provides supplemental heating to the center zone of the heat shrink tube 10. The temperature value of the high-heating ring 7 is higher than that of the low-heating ring 8.

[0026] Temperature detection module 3, located outside the preheating chamber 4 and the heating chamber 5, is used to detect the temperature values ​​of the central and side areas of the heat shrink tubing 10.

[0027] The distance detection module 9 is located inside the preheating chamber 4 and the heating chamber 5. It is used to detect the distance between its output end and the center area and side area of ​​the heat shrink tube 10. The heat shrinkage amount of the heat shrink tube 10 is indirectly obtained through this distance value.

[0028] like Figure 6As shown, the present invention provides a control method for a heat-shrinking device for LED string processing. This control method utilizes a heat-shrinking device for LED string processing to perform heat-shrinking treatment on the LED string, including the following steps: S1. Welding and assembly: Each execution unit performs welding and assembly of the light string on the intermittently rotating clamping plate 1. After welding and assembly, the light string is formed. The heating temperatures of the low-heat ring 8 and high-heat ring 7 inside the preheating chamber 4, heating chamber 5 and forming chamber 6 are all initial temperature values. These initial temperature values ​​are obtained through multiple experimental calibrations, which will not be elaborated here.

[0029] S2. Connect the heat shrink tubing 10. The clamping disc 1 drives the light string to rotate to the tubing module 11. The tubing module 11 places the heat shrink tubing 10 on the outside of the assembled light string. At this time, the heat shrink tubing 10 is only placed on the outside of the light string and needs to be further heat-shrinked.

[0030] S3. Heat shrink tubing 10 is preheated and vented. Clamping disc 1 drives the light string to rotate into the preheating chamber 4. The low-heat ring 8 inside the preheating chamber 4 preheats and vents the entire heat shrink tubing 10, while the high-heat ring 7 compensates for the heat in the central area of ​​the heat shrink tubing 10. The preheating chamber 4 mainly preheats the heat shrink tubing 10. During this process, the gas in the central area of ​​the light string is vented and the heat shrink tubing 10 is preheated and shrunk.

[0031] S4. Data detection: After the preheating chamber 4 has finished preheating and venting, the heat shrinking module 2 moves away from the clamping plate 1. The distance detection module 9 detects the distance between its output end and the center and side areas of the heat shrink tube 10. The temperature detection module 3 detects the temperature values ​​of the center and side areas of the heat shrink tube 10 and executes the judgment strategy. The heat shrinking status of the heat shrink tube 10 is obtained through the above data detection, and the necessary judgment and adjustment are made through the judgment strategy.

[0032] S5. Heat shrink forming: The clamping plate 1 drives the light string to rotate into the heating chamber 5. The low-heat ring 8 inside the heating chamber 5 performs heat shrink forming on the heat shrink tube 10 as a whole, and the high-heat ring 7 performs heat compensation on the central area of ​​the heat shrink tube 10. The heating chamber 5 heat shrinks the heat shrink tube 10.

[0033] S6. Cooling and shaping: The clamping plate 1 drives the light string to rotate into the forming cavity 6 for cooling and shaping.

[0034] S7. Recycling: The clamping disc 1 pulls the light string out of the forming cavity 6 and performs zoned recycling of the light string.

[0035] In summary, during use, the clamping plate 1 operates intermittently, and each of the supporting execution units completes the welding and assembly of the light strings at each clamping station of the clamping plate 1. At the same time, the low-heat ring 8 and high-heat ring 7 in the preheating chamber 4, heating chamber 5, and forming chamber 6 are preheated to the preset initial temperature value to complete the preheating preparation of the equipment.

[0036] The clamping plate 1 drives the assembled light string to rotate to the corresponding station of the sleeve module 11. The sleeve module 11 automatically pushes the heat shrink tubing 10 and completely sleeves it on the outside of the welding joint of the light string, thereby completing the sleeve process of the heat shrink tubing 10.

[0037] The clamping tray 1 continues to transport the light string into the preheating chamber 4. The heat shrinking module 2 moves closer to the clamping tray 1 and brings the light string into the preheating chamber 4. The low-heating ring 8 in the preheating chamber 4 preheats the entire heat shrinking tube 10 evenly. The high-heating ring 7 set in the center of the low-heating ring 8 compensates for the heat in the central area of ​​the heat shrinking tube 10. Under the gradient heating effect, the gas wrapped in the gap between the heat shrinking tube 10 and the light string is discharged.

[0038] Then, the heat shrink module 2 moves away from the clamping plate 1 and causes the light string to detach from the preheating chamber 4. The distance detection module 9 collects the distance values ​​between itself and the center area and the side area of ​​the heat shrink tube 10, respectively. The temperature detection module 3 collects the temperature values ​​of the center area and the side area of ​​the heat shrink tube 10 simultaneously, and adjusts the heat shrink state of the heat shrink tube 10 with the help of the judgment strategy.

[0039] Then, the clamping plate 1 moves the light string to the heating chamber 5. The heat shrinking module 2 moves closer to the clamping plate 1 and puts the light string into the heating chamber 5. The low-heating ring 8 in the heating chamber 5 continuously heats the heat shrinking tube 10 as a whole, causing it to continue to shrink and cover the light string. The high-heating ring 7 continuously heats the central area of ​​the heat shrinking tube 10 to adapt to the size difference of the light string's axial edge thickness.

[0040] Furthermore, during the heat shrinking process, since the high-heat ring 7 and the low-heat ring 8 conduct heat to the heat shrink tube 10 through the air, the heating temperature of the high-heat ring 7 will inevitably be conducted to the side area. However, the heating efficiency of the high-heat ring 7 to the central area of ​​the heat shrink tube 10 is greater than that to the side area of ​​the heat shrink tube 10.

[0041] After the heat shrink tubing 10 is heat-shrinked, the heat shrink module 2 moves away from the clamping plate 1 and the light string is separated from the heating chamber 5. The clamping plate 1 transfers the light string to the forming chamber 6. The heat shrink module 2 moves closer to the clamping plate 1 and the light string enters the forming chamber 6. The forming chamber 6 quickly cools down the heat shrink tubing 10 after it has been shrunk at high temperature and fixes the covering shape.

[0042] After the heat shrink tubing 10 is cooled and shaped, the heat shrink module 2 moves away from the clamping plate 1 and the light string is removed from the forming cavity 6. The clamping plate 1 moves the light string out of the forming cavity 6, completing the entire heat shrink processing of a single light string. The equipment implements zoned recycling and storage of the light string according to the product condition.

[0043] Example 2 Based on the above embodiments, the heat shrink device cannot distinguish between excessive shrinkage in the central area of ​​the heat shrink tube 10 due to overheating, excessive shrinkage caused by the heat shrink tube 10 being too thin, and assembly defects of the light string itself. It is difficult to accurately adjust the temperature of the low-heat ring 8 and the high-heat ring 7 in the heating cavity 5. Furthermore, it cannot distinguish between bulges formed by gas not being discharged in time in the central area of ​​the heat shrink tube 10, excessively thick heat shrink tube 10 resulting in insufficient heat shrinkage, and assembly defects of the light string. Therefore, it is impossible to adjust the temperature control parameters of the heating cavity 5 in a targeted manner.

[0044] In summary, the judgment strategies include: When the distance detection module 9 detects that the distance value of the center area is less than the set minimum distance value of the center area, that is, the heat shrinkage degree of the center area of ​​the heat shrink tube 10 is too small, resulting in the center area of ​​the heat shrink tube 10 being too close to the output end surface of the distance detection module 9, and when the distance detection module 9 detects that the distance value of the side area is less than the set minimum distance value of the side area, that is, the heat shrinkage degree of the side area of ​​the heat shrink tube 10 is too small, resulting in the side area of ​​the heat shrink tube 10 being too close to the output end surface of the distance detection module 9, the first strategy is executed.

[0045] The first strategy includes: When the distance detection module 9 detects that the distance difference between the center area and the side area is greater than the set minimum distance difference and less than the set maximum distance difference, that is, the difference between the heat shrinkage amount in the center area and the heat shrinkage amount in the side area of ​​the heat shrink tube 10 is stable, and the temperature detection module 3 detects that the temperature values ​​in both the side area and the center area of ​​the heat shrink tube 10 are greater than the set minimum temperature value and less than the set maximum temperature value, that is, the temperature values ​​in the center area and the side area of ​​the heat shrink tube 10 are stable, it indicates that the overall diameter of the heat shrink tube 10 has increased, but the initial temperature value in the preheating chamber 4 is too low, causing the heat shrink tube 10 to not shrink to the preset position. It is only necessary to increase the temperature values ​​of the low heating ring 8 and the high heating ring 7 in the heating chamber 5 for compensation. This heat shrink tube 10 is marked as a large diameter product, and S5 is executed.

[0046] If heat shrink tubing 10 is a large diameter product more than five times in a row, it indicates that the diameter value of heat shrink tubing 10 in this batch is relatively large. At this time, the initial temperature value of the high-heat ring 7 and low-heat ring 8 in the preheating chamber 4 and heating chamber 5 should be increased again, and the staff should be reminded.

[0047] If heat shrink tubing 10 is not a large-diameter product for more than five consecutive times, it indicates that the large diameter of heat shrink tubing 10 this time is an accidental event. There is no need to reset the initial temperature values ​​of the high-temperature ring 7 and the low-temperature ring 8. Just mark this heat shrink tubing 10 as a large-diameter product.

[0048] When the distance detection module 9 detects that the distance difference between the center area and the side area is greater than the set minimum distance difference but less than the set maximum distance difference, and the temperature detection module 3 detects that the temperature values ​​of both the side area and the center area of ​​the heat shrink tube 10 are less than the set minimum temperature value, it indicates that the heating temperature of the heat shrink tube 10 by the low heating ring 8 and the high heating ring 7 in the preheating chamber 4 is too low, which causes the heat shrink tube 10 to not shrink to the preset position. That is, it means that the overall diameter of the heat shrink tube 10 is stable, but the temperature values ​​of the center area and the side area of ​​the heat shrink tube 10 have decreased, causing the heat shrink tube 10 to not shrink to the preset position. It is only necessary to increase the temperature values ​​of the low heating ring 8 and the high heating ring 7 in the heating chamber 5 for compensation, and then execute S5.

[0049] When the distance detection module 9 detects that the distance difference between the center area and the side area is less than the set minimum distance difference, and the temperature detection module 3 detects that the temperature difference between the center area and the side area of ​​the heat shrink tube 10 is less than the set minimum temperature difference, it indicates that the temperature difference between the low-heat ring 8 and the high-heat ring 7 in the preheating chamber 4 is too small and the heating temperature of the high-heat ring 7 is too low, resulting in the gas in the center of the heat shrink tube 10 not being discharged. That is, the heating temperature of the heat shrink tube 10 by both the high-heat ring 7 and the low-heat ring 8 is reduced, and the temperature reduction of the high-heat ring 7 is greater than that of the low-heat ring 8, resulting in a small temperature difference between the high-heat ring 7 and the low-heat ring 8. Consequently, when the heat shrink tube 10 is heat-shrinked on the outside of the light string, the side area of ​​the heat shrink tube 10 adheres to the light string first, resulting in the gas in the center area of ​​the light string not being discharged. This light string is marked as a defective product, the temperature values ​​of the high-heat ring 7 and the low-heat ring 8 in the preheating chamber 4 are increased, and S5 is executed.

[0050] When the distance detection module 9 detects that the distance difference between the center area and the side area is less than the set minimum distance difference, and the temperature detection module 3 detects that the temperature difference between the center area temperature and the side area temperature of the heat shrink tubing 10 is greater than the set minimum temperature difference and less than the set maximum temperature difference, if the heat shrink tubing 10 is only affected by the temperatures of the low heat ring 8 and the high heat ring 7, the difference in heat shrinkage between the center area and the side area of ​​the heat shrink tubing 10 should be within the preset difference range. However, at this time, the difference in heat shrinkage between the center area and the side area of ​​the heat shrink tubing 10 is less than the set minimum heat shrinkage difference, indicating that the overall diameter of the heat shrink tubing 10 has increased and the increase in the diameter of the center area is greater than that of the side area. That is, the diameter of the heat shrink tubing 10 is greater than the standard value, and there is a bulging phenomenon in the center area of ​​the heat shrink tubing 10 when heat shrinking is not performed. This light string is marked as a defective product, and S5 is executed.

[0051] When the distance detection module 9 detects that the distance difference between the center area and the side area is greater than the set maximum distance difference, and the temperature detection module 3 detects that the temperature difference between the center area and the side area of ​​the heat shrink tube 10 is greater than the maximum temperature difference, it indicates that the temperature difference between the low-heat ring 8 and the high-heat ring 7 in the preheating chamber 4 is too large and the heating temperature of the low-heat ring 8 is too low, resulting in the heat shrink tube 10 not shrinking to the appropriate size. That is, at this time, the distance between the surface of the heat shrink tube 10 and the distance detection module 9 becomes smaller, and the side area of ​​the heat shrink tube 10 does not adhere to the surface of the side area of ​​the light string, resulting in a small overall heat shrinkage of the heat shrink tube 10. Increasing the temperature value of the low-heat ring 8 in the preheating chamber 4 and the heating chamber 5 will allow the gas in the center area of ​​the heat shrink tube 10 to be discharged normally, and the light string can be put into normal use and S5 will be executed.

[0052] When the distance detection module 9 detects that the distance difference between the center area and the side area is greater than the set maximum distance difference, and the temperature detection module 3 detects that the temperature difference between the center area temperature and the side area temperature of the heat shrink tubing 10 is greater than the set minimum temperature difference and less than the set maximum temperature difference, if the heat shrink tubing 10 is only affected by the temperatures of the low heat ring 8 and the high heat ring 7, the difference in heat shrinkage between the center area and the side area of ​​the heat shrink tubing 10 should be within the preset difference range. However, at this time, the difference in heat shrinkage between the center area and the side area of ​​the heat shrink tubing 10 is greater than the set maximum heat shrinkage difference, indicating that the overall diameter of the heat shrink tubing 10 has increased and the increase in the diameter of the center area is less than that of the side area. That is, the diameter of the heat shrink tubing 10 is greater than the standard value, and there is a dent in the center area of ​​the heat shrink tubing 10 when it is not heat-shrinked. This light string is marked as a defective product, and S5 is executed.

[0053] When the distance detection module 9 detects that the distance value of the center area is greater than the set minimum distance value of the center area and less than the set maximum distance value of the center area, that is, the heat shrinkage degree of the center area of ​​the heat shrink tube 10 is within the preset range and the heat shrinkage amount of the heat shrink tube 10 is normal, and the distance value of the side area is greater than the set minimum distance value of the side area and less than the set maximum distance value of the side area, that is, the heat shrinkage degree of the side area of ​​the heat shrink tube 10 is within the preset range and the heat shrinkage amount of the heat shrink tube 10 is normal, it means that the heat shrink tube 10 is preheating and venting normally in the preheating chamber 4, and can carry out subsequent work normally, and execute S5.

[0054] When the distance detection module 9 detects that the distance value of the center area is less than the set minimum distance value or greater than the set maximum distance value of the center area, that is, the heat shrinkage degree of the center area of ​​the heat shrink tube 10 is too small or too large, causing the center area of ​​the heat shrink tube 10 to be too close or too far from the surface of the distance detection module 9, and the distance value of the side area is less than the set maximum distance value of the side area and greater than the set minimum distance value of the side area, that is, the heat shrinkage degree of the side area of ​​the heat shrink tube 10 is within the preset range, the heat shrinkage amount of the side area of ​​the heat shrink tube 10 is normal, and the second strategy is executed.

[0055] The second strategy includes: When the temperature detection module 3 detects that the temperature value of the center area of ​​the heat shrink tubing 10 is less than the set minimum temperature value, the distance detection module 9 will also detect that the distance value of the center area is less than the set minimum distance value. This indicates that the temperature of the high-heat ring 7 in the preheating chamber 4 is too low. The temperature value of the high-heat ring 7 in the preheating chamber 4 is increased. However, because the temperature of the high-heat ring 7 is too low, the temperature difference between the low-heat ring 8 and the high-heat ring 7 decreases. As a result, when the heat shrink tubing 10 is preheating and venting, the side area of ​​the heat shrink tubing 10 first adheres to the surface of the light string, and the gas inside the center area of ​​the heat shrink tubing 10 cannot be discharged. At this time, the light string is marked as a defective product, and S5 is executed.

[0056] When the temperature detection module 3 detects that the temperature value of the center area of ​​the heat shrink tubing 10 is greater than the set minimum value but less than the set maximum temperature value, it indicates that the temperature value of the high-temperature ring 7 has not changed. The change in the overall heat shrinkage of the heat shrink tubing 10 is not caused by temperature, but by the change in the diameter of the middle position of the heat shrink tubing 10. This light string is marked as a defective product, and S5 is executed.

[0057] Specifically, when the temperature detection module 3 detects that the temperature value of the center area of ​​the heat shrink tubing 10 is greater than the set minimum value but less than the set maximum temperature value, and the distance detection module 9 detects that the distance value of the center area is less than the set minimum distance value of the center area, it indicates that the diameter of the middle position of the heat shrink tubing 10 has increased, resulting in the heat shrinkage amount of the center area of ​​the heat shrink tubing 10 being too small at the same temperature and not shrinking to the preset position, and the gas in the center area is not discharged. This light string is marked as a defective product, and S5 is executed. If the temperature detection module 3 detects that the temperature value of the center area of ​​the heat shrink tubing 10 is greater than the set minimum value but less than the set maximum temperature value, and the distance detection module 9 detects that the distance value of the center area is greater than the set maximum distance value of the center area, it indicates that the diameter of the middle position of the heat shrink tubing 10 has become smaller, resulting in excessive heat shrinkage in the center area of ​​the heat shrink tubing 10 at the same temperature. This light string is marked as a defective product, and S5 is executed.

[0058] When the temperature detection module 3 detects that the temperature value of the center area of ​​the heat shrink tubing 10 is greater than the set maximum temperature value, the distance detection module 9 will also detect that the distance value of the center area is greater than the set maximum distance value. This indicates that the temperature of the high-heat ring 7 in the preheating chamber 4 is too high. The temperature value of the high-heat ring 7 in the preheating chamber 4 is reduced. Because the temperature of the high-heat ring 7 is too high, the temperature difference between the low-heat ring 8 and the high-heat ring 7 increases. As a result, when the heat shrink tubing 10 is preheated and exhausts, all the gas in the center area of ​​the heat shrink tubing 10 can be exhausted. At this time, the temperature value of the high-heat ring 7 in the heating chamber 5 is reduced to compensate, so that the heat shrinkage of the heat shrink tubing 10 can be restored to the preset value. The light string can be used normally and S5 is executed.

[0059] When the distance detection module 9 detects that the distance value of the center area is greater than the set minimum distance value of the center area and less than the set maximum distance value of the center area, that is, the heat shrinkage amount of the center area of ​​the heat shrink tube 10 is within the preset range, and the distance value of the side area is greater than the set maximum distance value of the side area or less than the set minimum distance value of the side area, that is, the heat shrinkage degree of the side area of ​​the heat shrink tube 10 is too small or too large, resulting in the side area of ​​the heat shrink tube 10 being too close or too far from the surface of the distance detection module 9, the third strategy is executed.

[0060] The third strategy includes: When the temperature detection module 3 detects that the temperature value of the side area of ​​the heat shrink tubing 10 is less than the set minimum temperature value, the distance detection module 9 will also detect that the distance value of the side area is less than the set minimum distance value. This indicates that the temperature of the low-heat ring 8 in the preheating chamber 4 is too low. At this time, the temperature values ​​of the low-heat ring 8 in the preheating chamber 4 and the heating chamber 5 are increased. Because the temperature of the low-heat ring 8 is too low, the temperature difference between the low-heat ring 8 and the high-heat ring 7 increases. As a result, when the heat shrink tubing 10 is preheated and vented, the central area of ​​the heat shrink tubing 10 first adheres to the surface of the light string, and all the gas in the central area of ​​the heat shrink tubing 10 can be vented. At this time, the temperature value of the low-heat ring 8 in the heating chamber 5 is increased to compensate, so that the heat shrinkage of the heat shrink tubing 10 can be restored to the preset value, the light string can be used normally, and S5 is executed.

[0061] When the temperature detection module 3 detects that the temperature value of the side area of ​​the heat shrink tubing 10 is greater than the set minimum value and less than the set maximum temperature value, it indicates that the temperature value of the low heat ring 8 has not changed. The change in the heat shrinkage amount of the heat shrink tubing 10 is not caused by temperature, but by the change in the diameter of the side position of the heat shrink tubing 10. This light string is marked as a defective product, and S5 is executed.

[0062] Specifically, when the temperature detection module 3 detects that the temperature value of the side area of ​​the heat shrink tubing 10 is greater than the set minimum value but less than the set maximum temperature value, and the distance detection module 9 detects that the distance value of the side area is less than the set minimum distance value of the side area, it indicates that the diameter of the side area of ​​the heat shrink tubing 10 has increased, resulting in the heat shrinkage amount of the side area of ​​the heat shrink tubing 10 being too small at the same temperature and not shrinking to the preset position. This light string is marked as a defective product, and S5 is executed.

[0063] When the temperature detection module 3 detects that the temperature value of the side area of ​​the heat shrink tubing 10 is greater than the set minimum value but less than the set maximum temperature value, and the distance detection module 9 detects that the distance value of the side area is greater than the set maximum distance value of the center area, it indicates that the diameter of the middle position of the heat shrink tubing 10 has become smaller, resulting in excessive heat shrinkage of the side area of ​​the heat shrink tubing 10 at the same temperature, and the gas in the center area has not been discharged. This light string is marked as a defective product, and S5 is executed.

[0064] When the temperature detection module 3 detects that the temperature value of the side area of ​​the heat shrink tubing 10 is greater than the set maximum temperature value, the distance detection module 9 will detect that the distance value of the side area is greater than the set maximum distance value of the center area. This indicates that the temperature of the low-heat ring 8 in the preheating cavity 4 is too high. The temperature value of the low-heat ring 8 in the preheating cavity 4 is reduced. Because the temperature of the low-heat ring 8 is too high, the temperature difference between the low-heat ring 8 and the high-heat ring 7 is reduced. As a result, when the heat shrink tubing 10 is preheating and venting, the side area of ​​the heat shrink tubing 10 first adheres to the surface of the light string, causing the gas in the center area of ​​the heat shrink tubing 10 to be unable to be vented. At this time, the light string is marked as a defective product, and S5 is executed.

[0065] When the distance detection module 9 detects that the distance value of the center area is greater than the set maximum distance value of the center area, that is, the heat shrinkage degree of the center area of ​​the heat shrink tube 10 is too large, resulting in the distance between the center area of ​​the heat shrink tube 10 and the output end surface of the distance detection module 9 being too far, and when the distance detection module 9 detects that the distance value of the side area is greater than the set maximum distance value of the side area, that is, the heat shrinkage degree of the side area of ​​the heat shrink tube 10 is too large, resulting in the distance between the side area of ​​the heat shrink tube 10 and the output end surface of the distance detection module 9 being too far, the fourth strategy is executed.

[0066] The fourth strategy includes: When the distance detection module 9 detects that the distance difference between the center area and the side area is greater than the set minimum distance difference and less than the set maximum distance difference, that is, the difference between the heat shrinkage amount in the center area and the heat shrinkage amount in the side area of ​​the heat shrink tube 10 is stable, and the temperature detection module 3 detects that the temperature values ​​in both the side area and the center area of ​​the heat shrink tube 10 are greater than the set minimum temperature value and less than the set maximum temperature value, that is, the temperature values ​​in the center area and the side area of ​​the heat shrink tube 10 are stable, it indicates that the overall diameter of the heat shrink tube 10 has decreased, while the initial temperature value in the preheating chamber 4 is too high, causing the heat shrink tube 10 to continue to shrink after shrinking to the preset position. It is only necessary to reduce the temperature values ​​of the low-heat ring 8 and the high-heat ring 7 in the heating chamber 5 for compensation. This heat shrink tube 10 is marked as a small-diameter product, and S5 is executed.

[0067] If heat shrink tubing 10 is consistently a small diameter product more than five times, it indicates that the diameter of this batch of heat shrink tubing 10 is generally small. In this case, the initial temperature values ​​of the high-temperature ring 7 and low-temperature ring 8 in the preheating chamber 4 and heating chamber 5 should be lowered again, and the staff should be reminded.

[0068] If the heat shrink tubing 10 is not a small diameter product for more than five consecutive times, it means that the small diameter of the heat shrink tubing 10 this time is an accidental event. There is no need to reset the preset temperature range of the high heat ring 7 and the low heat ring 8. Just mark the heat shrink tubing 10 this time as a small diameter product.

[0069] When the distance detection module 9 detects that the distance difference between the center area and the side area is greater than the set minimum distance difference but less than the set maximum distance difference, and the temperature detection module 3 detects that the temperature values ​​of both the side area and the center area of ​​the heat shrink tube 10 are greater than the set maximum temperature value, it indicates that the heating temperature of the heat shrink tube 10 by the low-heat ring 8 and the high-heat ring 7 in the preheating chamber 4 is too high, causing the heat shrink tube 10 to shrink to the preset position and continue to shrink after shrinking to the preset position. This means that the overall diameter of the heat shrink tube 10 is stable, but the temperature values ​​of the center area and the side area of ​​the heat shrink tube 10 are both increased, causing the heat shrink tube 10 to continue to shrink after shrinking to the preset position. It is only necessary to reduce the temperature values ​​of the low-heat ring 8 and the high-heat ring 7 in the heating chamber 5 for compensation, and then execute S5.

[0070] When the distance detection module 9 detects that the distance difference between the center area and the side area is greater than the set maximum distance difference, and the temperature detection module 3 detects that the temperature difference between the center area and the side area of ​​the heat shrink tube 10 is greater than the set maximum temperature difference, it indicates that the temperature difference of the high-heat ring 7 in the preheating chamber 4 is too large, causing the center position of the heat shrink tube 10 to shrink too much. That is, the heating temperature of the heat shrink tube 10 by both the high-heat ring 7 and the low-heat ring 8 increases, and the temperature increase of the high-heat ring 7 is greater than that of the low-heat ring 8, resulting in a large temperature difference between the high-heat ring 7 and the low-heat ring 8. As a result, when the heat shrink tube 10 is heat-shrinked outside the light string, the center area of ​​the heat shrink tube 10 first adheres to the light string, allowing all the gas in the center area of ​​the heat shrink tube 10 to be discharged. At this time, the temperature value of the high-heat ring 7 in the preheating chamber 4 and the heating chamber 5 is reduced, and S5 is executed.

[0071] When the distance detection module 9 detects that the distance difference between the center area and the side area is greater than the set maximum distance difference, and the temperature detection module 3 detects that the temperature difference between the center area temperature and the side area temperature of the heat shrink tubing 10 is greater than the set minimum temperature difference and less than the set maximum temperature difference, if the heat shrink tubing 10 is only affected by the temperatures of the low heat ring 8 and the high heat ring 7, the difference in heat shrinkage between the center area and the side area of ​​the heat shrink tubing 10 should be within the preset difference range. However, at this time, the difference in heat shrinkage between the center area and the side area of ​​the heat shrink tubing 10 is greater than the set maximum heat shrinkage difference, indicating that the overall diameter of the heat shrink tubing 10 has become smaller and the decrease in the diameter of the center area is greater than that of the side area. That is, the diameter of the heat shrink tubing 10 is smaller than the standard value, and there is a dent in the center area of ​​the heat shrink tubing 10 when it is not heat-shrinked. This light string is marked as a defective product, and S5 is executed.

[0072] When the distance detection module 9 detects that the distance difference between the center area and the side area is less than the set minimum distance difference, and the temperature detection module 3 detects that the temperature difference between the center area and the side area of ​​the heat shrink tube 10 is less than the minimum temperature difference, it indicates that the temperature difference between the low-heat ring 8 and the high-heat ring 7 in the preheating chamber 4 is too small and the heating temperature of the low-heat ring 8 is too high, resulting in the overall shrinkage size of the heat shrink tube 10 being too large. That is, at this time, the distance between the surface of the heat shrink tube 10 and the distance detection module 9 increases, the side area of ​​the heat shrink tube 10 is completely attached to the surface of the side area of ​​the light string, and the side area of ​​the heat shrink tube 10 is attached to the surface of the side area of ​​the light string first. The gas in the center area of ​​the heat shrink tube 10 cannot be discharged, the temperature value of the low-heat ring 8 in the preheating chamber 4 and the heating chamber 5 is reduced, the light string is marked as a defective product, and S5 is executed.

[0073] When the distance detection module 9 detects that the distance difference between the center area and the side area is less than the set minimum distance difference, and the temperature detection module 3 detects that the temperature difference between the center area temperature and the side area temperature of the heat shrink tubing 10 is greater than the set minimum temperature difference and less than the set maximum temperature difference, if the heat shrink tubing 10 is only affected by the temperatures of the low heat ring 8 and the high heat ring 7, the difference in heat shrinkage between the center area and the side area of ​​the heat shrink tubing 10 should be within the preset difference range. However, at this time, the difference in heat shrinkage between the center area and the side area of ​​the heat shrink tubing 10 is less than the set minimum heat shrinkage difference, indicating that the overall diameter of the heat shrink tubing 10 has become smaller and the decrease in the diameter of the center area is less than that of the side area. That is, the diameter of this heat shrink tubing 10 is less than the standard value, and there is a bulging phenomenon in the center area of ​​the heat shrink tubing 10 even without heat shrinking. This light string is marked as a defective product, and S5 is executed.

[0074] The light string and heat shrink tubing 10 are continuously tested and judged according to the above process, and the temperature values ​​of the high-heat ring 7 and low-heat ring 8 inside the preheating chamber 4 and heating chamber 5 are adjusted accordingly to realize the heat shrink forming process of the light string and heat shrink tubing 10.

[0075] Finally, it should be determined that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been thoroughly evaluated with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A heat shrinking device for processing LED light strings, comprising a clamping tray (1), a sleeve module (11) being provided on one side of the clamping tray (1), the sleeve module (11) being used to sleeve heat shrink tubing (10) onto the surface of the light string, characterized in that, Also includes: The heat shrink module (2) is located on one side of the clamping plate (1) and includes a preheating cavity (4), a heating cavity (5) and a forming cavity (6). The preheating cavity (4) and the heating cavity (5) are both equipped with a low-heat ring (8) and a high-heat ring (7) located at the center of the low-heat ring (8). The axial direction of the light string is divided into side area - center area - side area in sequence, and the temperature value of the high-heat ring (7) is higher than the temperature value of the low-heat ring (8). Temperature detection module (3), which is located outside the preheating cavity (4), is used to detect the temperature values ​​of the central area and the side area of ​​the heat shrink tube (10); The distance detection module (9) is located outside the preheating cavity (4) and is used to detect the distance between its output end and the center and side areas of the heat shrink tube (10).

2. A control method for a heat-shrinking device for LED string processing, wherein the control method utilizes the heat-shrinking device for LED string processing as described in claim 1 to perform heat-shrinking treatment on the LED string, characterized in that, Includes the following steps: S1. Welding assembly: Each execution unit performs welding assembly of the lamp string on the intermittently rotating clamping plate (1). The heating temperatures of the low-heat ring (8) and high-heat ring (7) inside the preheating chamber (4), heating chamber (5) and forming chamber (6) are all the initial temperature values. S2. Connect the heat shrink tubing (10). The clamping disc (1) drives the light string to rotate to the tubing module (11). The tubing module (11) places the heat shrink tubing (10) on the outside of the assembled light string. S3. Heat shrink tubing (10) is preheated and vented. The clamping disc (1) drives the light string to rotate into the preheating chamber (4). The low-heat ring (8) inside the preheating chamber (4) preheats and vents the entire heat shrink tubing (10), and the high-heat ring (7) compensates for the heat in the central area of ​​the heat shrink tubing (10). S4. Data detection: After the preheating chamber (4) is preheated and vented, the heat shrink module (2) moves away from the clamping plate (1). The distance detection module (9) detects the distance between its output end and the center and side areas of the heat shrink tube (10). The temperature detection module (3) detects the temperature values ​​of the center and side areas of the heat shrink tube (10) and executes the judgment strategy. S5, heat shrink molding, the clamping plate (1) drives the light string to rotate into the heating chamber (5), the low heat ring (8) inside the heating chamber (5) heat shrinks the heat shrink tube (10) as a whole, and the high heat ring (7) compensates for the heat in the central area of ​​the heat shrink tube (10). S6. Cooling and shaping: The clamping plate (1) drives the light string to rotate into the forming cavity (6) for cooling and shaping. S7. Recycling: The clamping disc (1) drives the light string to leave the molding cavity (6) and recycles the light string in sections.

3. The control method for a heat shrink device for LED string processing according to claim 2, characterized in that, The judgment strategy includes: When the distance detection module (9) detects that the distance value of the center area is less than the set minimum distance value of the center area and the distance value of the side area is less than the set minimum distance value of the side area, the first strategy is executed; When the distance detection module (9) detects that the distance value of the center area is greater than the set minimum distance value of the center area and less than the set maximum distance value of the center area, and the distance value of the side area is greater than the set minimum distance value of the side area and less than the set maximum distance value of the side area, it indicates that the heat shrink tubing (10) is preheating and venting normally in the preheating chamber (4), and executes S5; When the distance detection module (9) detects that the distance value of the center area is less than the set minimum distance value of the center area or greater than the set maximum distance value of the center area, and the distance value of the side area is less than the set maximum distance value of the side area and greater than the set minimum distance value of the side area, the second strategy is executed; When the distance detection module (9) detects that the distance value of the center area is greater than the set minimum distance value of the center area and less than the set maximum distance value of the center area, and the distance value of the side area is greater than the set maximum distance value of the side area or less than the set minimum distance value of the side area, the third strategy is executed. When the distance detection module (9) detects that the distance value of the center area is greater than the set maximum distance value of the center area and the distance value of the side area is greater than the set maximum distance value of the side area, the fourth strategy is executed.

4. The control method for a heat shrink device for LED string processing according to claim 3, characterized in that, The first strategy includes: When the distance detection module (9) detects that the distance difference between the distance value of the center area and the distance value of the side area is greater than the set minimum distance difference and less than the set maximum distance difference, and the temperature detection module (3) detects that the temperature values ​​of the side area and the center area of ​​the heat shrink tube (10) are both greater than the set minimum temperature value and less than the set maximum temperature value, it indicates that the overall diameter of the heat shrink tube (10) has increased, which increases the temperature values ​​of the low-heat ring (8) and the high-heat ring (7) in the heating cavity (5), and executes S5; When the distance detection module (9) detects that the distance difference between the distance value of the center area and the distance value of the side area is greater than the set minimum distance difference and less than the set maximum distance difference, and the temperature detection module (3) detects that the temperature values ​​of the side area and the center area of ​​the heat shrink tube (10) are both less than the set minimum temperature value, it indicates that the heating temperature of the heat shrink tube (10) by the low-heat ring (8) and the high-heat ring (7) in the preheating cavity (4) is too low, the temperature values ​​of the low-heat ring (8) and the high-heat ring (7) in the preheating cavity (4) and the heating cavity (5) are increased, and S5 is executed.

5. The control method for a heat shrink device for LED string processing according to claim 4, characterized in that, The first strategy also includes: When the distance detection module (9) detects that the distance difference between the center zone and the side zone is less than the set minimum distance difference, and the temperature detection module (3) detects that the temperature difference between the center zone temperature and the side zone temperature of the heat shrink tube (10) is less than the set minimum temperature difference, it indicates that the temperature difference between the low-heat ring (8) and the high-heat ring (7) in the preheating cavity (4) is too small and the heating temperature of the high-heat ring (7) is too low, resulting in the gas not being discharged from the center position of the heat shrink tube (10). Mark this light string as a defective product, increase the temperature values ​​of the low-heat ring (8) and the high-heat ring (7) in the preheating cavity (4), and execute S5. When the distance detection module (9) detects that the distance difference between the center area and the side area is less than the set minimum distance difference, and the temperature detection module (3) detects that the temperature difference between the center area temperature and the side area temperature of the heat shrink tube (10) is greater than the set minimum temperature difference and less than the set maximum temperature difference, it indicates that the overall diameter of the heat shrink tube (10) has increased and the increase in the diameter of the center area is greater than that of the side area. This light string is marked as a defective product, and S5 is executed. When the distance detection module (9) detects that the distance difference between the center area and the side area is greater than the maximum distance difference set, and the temperature detection module (3) detects that the temperature difference between the center area temperature and the side area temperature of the heat shrink tube (10) is greater than the maximum temperature difference, it indicates that the temperature difference between the low-heat ring (8) and the high-heat ring (7) in the preheating cavity (4) is too large and the heating temperature of the low-heat ring (8) is too low, resulting in the heat shrink tube (10) not shrinking to the appropriate size. Increase the temperature value of the low-heat ring (8) in the preheating cavity (4) and the heating cavity (5), and execute S5. When the distance detection module (9) detects that the distance difference between the center area and the side area is greater than the maximum distance difference set, and the temperature detection module (3) detects that the temperature difference between the center area temperature and the side area temperature of the heat shrink tube (10) is greater than the minimum temperature difference set and less than the maximum temperature difference set, it indicates that the overall diameter of the heat shrink tube (10) has increased and the increase in the diameter of the center area is less than that of the side area. This light string is marked as a defective product, and S5 is executed.

6. The control method for a heat shrink device for LED string processing according to claim 3, characterized in that, The second strategy includes: When the temperature detection module (3) detects that the temperature value of the center area of ​​the heat shrink tubing (10) is less than the set minimum temperature value, it indicates that the temperature of the high-temperature ring (7) in the preheating cavity (4) is too low. The temperature value of the high-temperature ring (7) in the preheating cavity (4) is increased, the light string is marked as a defective product, and S5 is executed. When the temperature detection module (3) detects that the temperature value of the center area of ​​the heat shrink tubing (10) is greater than the set minimum value and less than the set maximum temperature value, it indicates that the diameter of the heat shrink tubing (10) in the middle position has changed, and the light string is marked as a defective product and S5 is executed. When the temperature detection module (3) detects that the temperature value of the center area of ​​the heat shrink tube (10) is greater than the set maximum temperature value, it indicates that the temperature of the high-temperature ring (7) in the preheating cavity (4) is too high. The temperature value of the high-temperature ring (7) in the preheating cavity (4) is reduced, the temperature value of the high-temperature ring (7) in the heating cavity (5) is reduced to compensate, and S5 is executed.

7. The control method for a heat shrink device for LED string processing according to claim 3, characterized in that, The third strategy includes: When the temperature detection module (3) detects that the temperature value of the side area of ​​the heat shrink tube (10) is less than the set minimum temperature value, it indicates that the temperature of the low heat ring (8) in the preheating cavity (4) is too low. The temperature values ​​of the low heat ring (8) in the preheating cavity (4) and the heating cavity (5) are increased, and S5 is executed. When the temperature detection module (3) detects that the temperature value of the side area of ​​the heat shrink tubing (10) is greater than the set minimum value and less than the set maximum temperature value, it indicates that the diameter of the side position of the heat shrink tubing (10) has changed, and the light string is marked as a defective product and S5 is executed. When the temperature detection module (3) detects that the temperature value of the side area of ​​the heat shrink tubing (10) is greater than the set maximum temperature value, it indicates that the temperature of the low-temperature ring (8) in the preheating cavity (4) is too high. The temperature value of the low-temperature ring (8) in the preheating cavity (4) is reduced, the light string is marked as a defective product, and S5 is executed.

8. The control method for a heat shrink device for LED string processing according to claim 3, characterized in that, The fourth strategy includes: When the distance detection module (9) detects that the distance difference between the distance value of the center area and the distance value of the side area is greater than the set minimum distance difference and less than the set maximum distance difference, and the temperature detection module (3) detects that the temperature values ​​of the side area and the center area of ​​the heat shrink tube (10) are both greater than the set minimum temperature value and less than the set maximum temperature value, it indicates that the overall diameter of the heat shrink tube (10) has decreased, reducing the temperature values ​​of the low-heat ring (8) and the high-heat ring (7) in the heating cavity (5), and executing S5; When the distance detection module (9) detects that the distance difference between the distance value of the center area and the distance value of the side area is greater than the set minimum distance difference and less than the set maximum distance difference, and the temperature detection module (3) detects that the temperature values ​​of the side area and the center area of ​​the heat shrink tube (10) are both greater than the set maximum temperature value, it indicates that the heating temperature of the heat shrink tube (10) by the low-heat ring (8) and the high-heat ring (7) in the preheating cavity (4) has increased, the temperature values ​​of the low-heat ring (8) and the high-heat ring (7) in the preheating cavity (4) and the heating cavity (5) have decreased, and S5 is executed.

9. The control method for a heat shrink device for LED string processing according to claim 8, characterized in that, The fourth strategy also includes: When the distance detection module (9) detects that the distance difference between the center area and the side area is greater than the maximum distance difference set, and the temperature detection module (3) detects that the temperature difference between the center area temperature and the side area temperature of the heat shrink tube (10) is greater than the maximum temperature difference set, it indicates that the temperature difference of the high-heat ring (7) in the preheating cavity (4) is too large, causing the heat shrink tube (10) to shrink too much at the center position. The temperature values ​​of the high-heat ring (7) in the preheating cavity (4) and the heating cavity (5) are reduced, and S5 is executed. When the distance detection module (9) detects that the distance difference between the distance value of the center area and the distance value of the side area is greater than the maximum distance difference set, and the temperature detection module (3) detects that the temperature difference between the temperature value of the center area and the temperature value of the side area of ​​the heat shrink tube (10) is greater than the minimum temperature difference set and less than the maximum temperature difference set, it indicates that the overall diameter of the heat shrink tube (10) has become smaller and the diameter reduction value of the center area is greater than that of the side area. This light string is marked as a defective product, and S5 is executed. When the distance detection module (9) detects that the distance difference between the center area and the side area is less than the set minimum distance difference, and the temperature detection module (3) detects that the temperature difference between the center area temperature and the side area temperature of the heat shrink tube (10) is less than the minimum temperature difference, it indicates that the temperature of the low-heat ring (8) in the preheating cavity (4) is too high, resulting in the overall shrinkage size of the heat shrink tube (10) being too large. Reduce the temperature values ​​of the low-heat ring (8) in the preheating cavity (4) and the heating cavity (5), mark this light string as a defective product, and execute S5; When the distance detection module (9) detects that the distance difference between the center area and the side area is less than the set minimum distance difference, and the temperature detection module (3) detects that the temperature difference between the center area temperature and the side area temperature of the heat shrink tubing (10) is greater than the set minimum temperature difference and less than the set maximum temperature difference, it indicates that the overall diameter of the light string has become smaller and the diameter reduction of the center area is less than that of the side area. This light string is marked as a defective product, and S5 is executed.

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